Reinforcing bar support



May 23, 1944.

w. P. AWBREY 2,349,399

REINFORCING BAR SUPPORT Filed March 23, 1942 2 Sheets-Sheet 1 INVENTOR, d, M705! Paua/[flwfiray ATTORNEY.

May 23, 1944.

w. P. AWBREY 1 2,349,399

REINFORCING BAR SUPPORT Filed March 23, 1942 2 Sheets-Sheet 2 I f IN ENTOR, 72 13 B {A l/{5'17 Pal 1d! flwrqy,

ATTORNEY.

Patented May 23, 1944 UNITED STATES PATENT OFFICE REINFORCING BAR. SUPPORT William Powell Awbi'ey. Kansas City, Mo. Application March 23, 1942, Serial No. 435,917

9 Claims.

This invention relates to improvements in reinforcing bar supports of the formed wire type. In reinforcing concrete construction, in order to obtain the most effective positioning of the reinforcing bars, it is found convenient to position the various bars at different vertical heights 3-:

sion of a reinforcing bar support having a plurality of bar seats disposed in angled relation whereby reinforcing bars disposed in relative transverse relation may be supported on the same supporting member.

A further object is the provision of a reinforcing bar chair having a series of substantially,

uniformly, and vertically offset seats for reinforcing bars.

Other objects are ease and economy of construction, stability and efficiency of operation,

and adaptability for use in supporting and spacing concrete reinforcing rods under the various forms of construction.

With these objects in view, as well as other objects which will be mentioned during the course of the specification, reference will now be had to the drawings wherein Figure 1 is a perspective view of a reinforcing bar support shown in the operative position and embodying this invention.

Fig. 2 is a plan view of the reinforcing bar support with transversely disposed reinforcing bars shown in position thereon in dotted lines.

Fig. 3 is an enlarged side elevation of the bar support with reinforcing bars shown in position thereon.

Fig. 4 is another side elevation of the reinforcing bar support with the supports turned through 90",

Fig. 5 is a side elevation of a modified form of this invention wherein but three supporting legs are provided.

Fig. 6 is another side elevation of the bar support shown in Fig. 5 taken at right angles to the position shown in Fig. 5.

Fig. 7 shows a further modified form of the chair comprising two wire members disposed at right angles to each other and each having two reinforcing rod seats.

Fig. 8 shows an elevation of this modified form at right angles to its position in Fig. 7.

Fig. 9 is a plan view of the bar support; shown in Fig. '7.

Fig. 10 presents an elevational view of a furmeans of the transversely disposed V-shaped leg member.

Fig. 11 is an end view of the bar support shown in Fig. 10.

Figs. 12 and 13 present elevational views of a still further modification of the bar support similar to that shown in Fig. 10, but with bar supporting seats formed in the 'U-shaped transverse leg stabilizing member.

Throughout the several views like reference characters refer to similar parts and the numeral designates a form surface upon which the concrete is to be poured. This form usually constitutes a series of rigidly supported boards 22 which are removed after the concrete is properly set. The concrete reinforcing bar 24 is usually supported above the surface 20 so as to be completely embedded within the concrete floor or beam when the structure is complete.

The bar support or chair 26 as shown in Figs. 1, 2, 3, and 4 comprises two wire members 28 and '30 welded or otherwise secured together at 32 in transverse relation. Member 28 is substantially of inverted U-shape with depending legs 34 and 36 each provided with an arcuate foot 38. These feet rest on the form boards and may be secured thereto by means of staples 40 thus making it possible to secure the chairs against shifting prior to and during the pouring of the concrete.

The upper portion of member 28 is provided with depressions 4|v to form rod seats or steps 42, 44, 46, and 48. It will be noted that these seats are vertically offset relative to the form surface 20. Chair member 30 is similarly formed to present legs and 52, seat 54, depressions 56, and rod seats 58, 60, 62, and 64.

For convenience" of positioning the reinforcing bar at definite positions above theform surfaceit is further convenient to form the rod seats in such a manner that their vertical heights from the form surface vary at uniform steps. For ex ample, seat 58 may be 4 inches from the floor; seat 60, 37 inches; seat 62, 3 /8 inches"; and so on down to seat 48 which would be 3% inches. This uniformity of steps makes it possible to more accurately place the reinforcing rods to the proper heightabov'e the form surface.

Since the rod steps vary in vertical height, as above explained, it is quite apparent that the reinfo'rcing bar 66, when placed on seat 58, will not interfere with reinforcing bar 68 which is supported on seat 48.;

Without departing from the spirit of this invention it is quite apparent that the seats might be formed to more neany' conform to the cross sectional shape of the reinforcing bar so as to definitely hold it against any material transverse Figs. 5 and 6, it will be noted that the chair member is substantially inverted L-shaped having a depending leg 12, foot 14, and horizontal portion 16 having a depression 16 to form a rod seat 80. The outer offset extremity 82 is welded to the inverted U-shaped chair member 84 at 86. This U-shaped chair member has depending legs 88 and 90 with up-turned feet 92 and is provided alongits top portion with depressions 94 to present rod seats 96 and 90., The chair seats 86, 96, and 96 are disposed in vertical offset relation so as to accommodate rods at different heights from the form. This modified form has the advantage'of. being a tripod which facilitates more accurate positioning of the feet on the form surface. V

The modified form shown in Figs. 7, 8, and 9 is substantially identical withthat shown in Figs. 1, 2, .3, and 4 with the exception that only two depressions are formed in each ofthe chair members. This chair comprises members I00 and I02 welded together in transverse relation at I04. Chair member I00 is provided with depending legs I06 having arcuate feet I68. Legs I06 are joined together by cross-member IIO having depressions II2 to form rod seats H4 and H6. Member I02 comprises cross-member II8 having depending legs I20 and feet I 22. Depressions are formed in cross-member II8 to present seats I24 and I26. This form provides a very sturdy structure since the legs are closely associated to carry heavy loads.. Furthermore this form is suitable for supporting intersecting reinforcing rods.

Referring now to the modified form shown in Figs. 10 and 11 it will be noted that the main member I30 is of substantially inverted, U-shaped form having depending legs I32 with feet I34. The body portion I36 is provided with depressions I38 of varying .depths to produce vertically stepped rod seatsv I40, I42, I44,and I46. 'Transversely disposed and rigidly welded at I49 to the center portion of member .130 is an inverted V-shaped member I48 having depending legs I50 with out-turned feet I52. Itwill be noted that this form presentsfour rod seats disposed at different vertical distances from the form surface thereby making it possible to vary the height of the rod support above the lower surface of the finished concrete structure.

The modified form shown-in Figs. 12 and 13 resembles to a large degree the modified form just described and comprises a main member I60 having depending legs I62 with inturned feet I 64. The upper portion I 66 of member I60 is undulated to present vertically offset rod seats I68, I10, I12, and I14. A relatively short cross-member I16 is welded to the underside of cross-member I66 at I18 and is provided with depending legs I80 having suitable turned feet I32. The upper portion I84 of member I16 is undulated to present rod supporting seats I86 and-I88. This type of chair provides for a plurality of; reinforcing rod seats disposed at right angles to each other.

While throughout the several views of the drawingsthe various rod seats of the different forms have been shown at different vertical can be accomplished without departing from the general construction of the chair.

It is apparent that many modifications embodying the new features of this invention may be made without departing from the spirit of the invention and it is therefore desired that the invention be limited only by the scope of the claims.

I claim:

1. A support for concrete-reinforcing rods comprising a wire framework having a plurality of vertically offset rod seats disposed in two vertical planes, said planes being in relatively angled relation.

2. A support for concrete-reinforcing rods Comprising a fabricated wire frame member having two series of vertically offset rod seats, said series being disposed at substantially right angles to each other.

3. A reinforcing rod chair comprising transversely interconnected irregularly undulated members whereby a series of bar supporting seats is presented in each of said members in relatively angled relation.

4. A support for reinforcing rods comprising a pair of formed wire members secured together in angled relation, and each provided with a plurality of vertically offset seats for supporting concrete-reinforcing bars above the form surface.

5. A reinforcing rod chair comprising transversely interconnected undulated wire members each formed to present an elongated series of vertically offset seats disposed in a common plane to support reinforcing bars.

6. A support for concrete-reinforcing rods comprising a fabricated Wire frame having depending legs oifset at their lower extremities to form feet, the upper portion of said wire frame being undulated to present vertically offset rod seats at the bottom of said undulations, all of said seats being disposed in a common vertical plane.

7. A support for concrete reinforcing rods comprising a wire frame member having a plurality of vertically offset rod seats disposed in two series with said series positioned in relative angled relation, all the rod'seats in one of said series being positioned below all the rod seats in the other of said series when the support is operatively positioned on a substantially horizontally disposed planar base.

8. A support for concrete-reinforcing rods comprising a wire frame having depending legs offset at their lower extremities to form feet, and having a series of horizontally spaced apart rod seats disposed at different vertical elevations and in a common plane to selectively support reinforcing rods at a plurality of different predetermined vertical distances above a horizontally disposed supporting surface.

9. A support for concrete-reinforcing bars comprising a, fabricated frame having a-plurality of legs whereby it is supported in an upright position on a substantially horizontalrstructural form surface, and a plurality of horizontally spaced apart rod seats disposed in. depressions formed at different vertical levels in the upper portion of said frame.

POWELL AWBREY. 

